Charles ellwood rambo



(No Model.) L

o. E. RAMBO.

BICYCLE LOCK. No. 579,443 Patented Mar. 23, 1897;

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CHARLES ELLW'OOD RAMBO, OF BERVYN, PENNSYLVANIA, ASSIGNORF ONE-I^IALF TOJOSEPH (l. POTTS, OF SAME PLACE.

BICYCLE-LOCK.

SPECIFICATIONforming part of Letters Patent No. 579,443, dated March 23,1897. Application filed January 2, 1896. Serial No. 574,072. (No model.)

To @ZZ whom iv' may concern:

Be it known that I, CHARLES ELLwooD RAMBO, a citizen of the UnitedStates, residing at Berwyn, in the county of Chester and State ofPennsylvania, have invented certain new and useful Improvements inBicycle- Locks, of which the following is a` specioan tion.

My invention relates to a new and useful improvement in bicycle-locks,and has for its object to provide such a device by the use of which thefront fork of a bicycle may be secured at any angle and prevented frombeing turned therefrom until the retaining mechanism is unlocked by key,and the result of this is that the bicycle cannot be used for ordinarypurposes, except by the person who is in possession of the key, after ithas been once locked.

With these ends in view the invention consists in the details ofconstruction and combination of element-shereinaftersetfortl1,and thenspecifically designated by the claims.

In order that those skilled in the art to which this inventionappertains may understand how t0 make and use the same, I will describeits construction and operation in detail, referring by number to theaccompanying drawings, forming a part of this specification, and inwhich- Figure l is a broken-away elevation of the head of abicycle-frame, showing the forkspindle and the locking mechanismunlocked; Fig. 2, a similar vieuT showing the locking mechanism locked;Fig. 3, a side elevation of a portion of the head, showing thekeyholecasing; Fig. et, a central section of the portion of the head,showing the mechanism upon which the key operates; Fig. 5, a sec tion atthe line y y of Fig. 4;; and Fig. 6 is a section at the line .9c 5c.

Similar numbers denote like parts in the views of the drawings.

l represents the head of a bicycle-frame made in tubular shape, throughwhich the fork-spindle 2 is adapted to pass and has its bearings withinsaid head in the usual mann ner. Around the lower portion of thisspindle is secured a truncated cone 3, having teeth or serrations uponits outer surface, and be neath it is a serrated ring l2, secured to theside of the tube l.

4 is a clutch loosely surrounding the spindle 2 and is slidable withinthe tube above the cone and also provided with serrations or teethadapted to engage the serrated surface of the cone and the ring for thepurpose hereinafter set forth.

5 is a yoke, the arms of which are pivoted at 6 to the clutch, and thisyoke is provided with an extension 7, which reaches through a slot 8 inthe side of the tube and is surrounded and protected by a casing 9, inwhich is formed a keyhole l0, adapted to receive a key and steady thesame during the lookin g and unlocking operations.

To lock the fork in a given position, it is only necessary to turn it tothat position and thrust the key through the keyhole l0 and somanipulate it as to cause its tang to operate the projections '7 todepress the clutch 4E into engagement wi th the socket 3. The clutchwill be held in this position by the spring ll entering a suitable notchin the side of the clutch-shank.' To unlock the fork, a reverse motionof the key is had.

It will be readily understood that as the steering-wheel of a bicycle isjournaled in the fork when said fork is locked at an angle to the frameof the machine itwill be impossible to use said machine for ridingpurposes.

In practice this lock is very effective, and as it is entirely concealedwithin the head of the frame it has proved to be a very desirable deviceby which a machine may be secured against theft in the usual manner.

I am aware that slight modilcations might be made in the constructionshown and described Witliout departing from the spirit of the invention.

Having thus fully described my invention, what I claim as new and usefulis l. In combination with the fork-spindle of a bicycle, a cone securedthereto, a clutch surrounding said spindle and slidingly secured to thefront tube of the machine, a fork pivoted to said clutch and to theframe of the machine, an extension from said fork, a casing surroundingthe end of said extension, having a keyhole formed therein, whereby aTOO suitable ke57 may be guided, in operating,` ssi-id extension,substantially as and :for the purposes set forth.

2. In t bcycle-lock, a serrated cone secu rod to the spindle of the forkof a machine, a serrated ring secured to the tube und a serrated clutchadapted to be inoved into engagement with the ring and cone, as and forthe purpose described.

3. In combination With the fork-spindle of a bicycle, a cone securedthereto, t ring secured to the tubing, :t clutch encircling said spindleand cone, u spring for determining the position of the clutch, it forkpivoted to said clutch and to the tubing, a casing sur" rounding the endof the fork having t keyhole formed therein, as and for the purposedescribed.

In testimony whereof I have hereunto :1f- 'xed my signature in thepresence of two subscribing witnesses.

C. ELIVOOD RAMBO.

lVitnesses:

S. S. WILLIAMSON, J. ALEXANDER CLARKE.

